实验室用电系统

Laboratory power supply

2023-03-26 16:51:09

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This text appears to be a detailed description and instruction manual for a 3D-printed DIY laboratory power supply. Here's a breakdown of the key information:

Features:

Variable Output: Provides 3.3V DC, 5V DC, 12V DC, -12V DC, and a variable voltage from 0-24V DC.
Accurate Control: Utilizes a DPS5005 lab power supply for precise voltage and current regulation.
Safety Features: Includes overcurrent protection (limited to 1A or 0.5A for -12V).

Modifications from Previous Design:

The user modified an existing design found on Thingiverse ([https://www.thingiverse.com/thing:5505502](https://www.thingiverse.com/thing:5505502)) by replacing the less accurate original measuring and control components with a DPS5005.

Construction:

3D Printing: The project relies heavily on 3D-printed parts, including the housing, front panel, and mounting brackets.
Additional Files: Split housing files are provided for users whose printers may have size limitations. These need to be glued together.
ATX Power Supply: A 400W ATX power supply is used as the primary power source.

Important Notes:

Load Resistor: A crucial 8.8 Ohm, 10-Watt resistor must be placed in series with the 5V output to protect the circuitry.
Wiring: The green wire from the ATX supply should be connected to ground (any black wire).
Glueing PLA: The author recommends using super glue for adhering PLA parts together.

Additional Information: